Cooper&#39;s sun plane



C. H. GROTH 1 COOPER'S SUN PLANE July 3, 1923.

Fi led Jan. 14, 1922 WI TNESSES Patented Jul 3, 1923.

UNITED STATES CHARLES H. GROTH, OF ROCHESTER, PENNSYLVANIA.

COOPER/S SUN PLANE.

Application filed January 14, 1922. Serial No. 529,182.

To all whom it may concern:

' Be it known that I, CHARLES H. Gno'rn, residing at Rochester, in the county of Beaver and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Coopers Sun Planes, of which improvements the following is a specification.

My invention relates to improvements in sun planes, that is to say in jack planes of the particular sort used to level the ends of the staves of a barrel when first they are assembled, and before the croze is out. It consists in features of structure which adapt the plane more exactly to the use for which it is intended.

A plane embodying my invention is illustrated in the accompanying drawings. Fig. I is a plan view of it from above; Fig. II a view in side elevation; and-Figs. III and IV are views in vertical section, on the planes indicated at IIIIII and IVIV, Fig. I.

The instrument consists essentially of a body 1, formed with an extended sole adapted to overlie widely the assembled ends of the staves of a barrel. The ends of this sole 1 are recurved, as indicated at c and d.

From the sole of this body portion depends a flange 2, adapted to engage the inner faces of the assembled staves, conform ing to them in its curvature, and adapted to serve as a guide in the operation of planing or leveling the stave ends.

The plate or body 1 is provided with op posit'e handles 4: and 5-opposite, that is to say, in that they are arranged on opposite sides of the guiding flange 2 and of the bit of the plane, presently to be mentioned. The handle 5 on the inside, that is the ham dle which when the instrument is in use comes within the end of the barrel, droops, as best shown in Fig. II. The reason for this'drooping is that a large component of the muscular force of the cooper is in con sequence applied to holding the plane to its 7 work, and so the tendency of the instrument to jump when it meets a knot or other i hard place in the wood, is more effectively resisted.

The bit 3 of theplane'is secured in the usual manner. of leveling the ends of the staves, the flange 2, already described, which in service en gages the staves, extends immediately adj acent the edge of the bit. This is well shown in Fig. I.

Since the operation is that with a shoulder 10. The assembly is best.

shown in Fig. III. Bit 3 extending beneath bridge 7 rests near its edge on'the rim or orifice a and rearwardly it-rests on block 6. Intermediately, it is borne upon by the forward end of plate 8, which valso extends beneath. bridge 7 and bears upon. bridge 7, I

and by screw 9 which engages a threaded opening in plate 8 rearward of the bridge.

As screw 9 isadvanced. bit 3 is clamped in position, as the screw leased for setting.

I claim as my invention:

A coopers sun plane in'cluding a plateis retracted it is relike body, abit, an orifice for the bit, a

bridge arranged rearward of the orifice,

a block arranged rearward of the bridge, a shouldered pressure plate adapted to' extend beneath "the bridge and by its shoulder to engage the forward edge of the bridge, and a screw extensible from said pressure plate, said pressure plate and screw adapted to engage at intermediate points and from above the bit introduced and rest-vv ing terminally upon the rim of the orifice and the block, substantially as described.

In testimony whereof I have hereunto set my hand. L I

- hi i I CHARLES H. 2 GROTH. I 2 mark Witnesses: W. A. HAR'rzEL, M. MoRoBER'rs; 

